what about levels
Posted by andrew piekutowski on May 25, 2006
Q: What level of oxygen does a tropical fish need?
State: Ontario
A: When you mention "tropical fish" you're covering a lot of ground. There are many different kinds of tropical fishes and they have different levels of oxygen requirements. In general, the more active fishes are those requiring a higher level of oxygen in the water. So, a fish like a catfish that lies on the bottom most of the time would require much less. If you have a filter and/or bubbler in your tank, your fish probably have adequate oxygen as long as your tank isn't overcrowded. There is a general "rule of thumb" that states that there should be no more than 2.5 centimeters (one inch) of fish (length) for every 4 liters (1 gallon) of water. Hope this helps you out.
John Wiessinger ( May 25, 2006)